Frequencies for first 10,000 rows of not_hour variable in accident dataset :

Notificatio |
     n Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        710        7.10        7.10
          1 |        164        1.64        8.74
          2 |        165        1.65       10.39
          3 |        101        1.01       11.40
          4 |         59        0.59       11.99
          5 |         51        0.51       12.50
          6 |         71        0.71       13.21
          7 |         70        0.70       13.91
          8 |         55        0.55       14.46
          9 |         66        0.66       15.12
         10 |         79        0.79       15.91
         11 |         61        0.61       16.52
         12 |         79        0.79       17.31
         13 |         92        0.92       18.23
         14 |        103        1.03       19.26
         15 |        123        1.23       20.49
         16 |        122        1.22       21.71
         17 |        123        1.23       22.94
         18 |        151        1.51       24.45
         19 |        151        1.51       25.96
         20 |        166        1.66       27.62
         21 |        151        1.51       29.13
         22 |        174        1.74       30.87
         23 |        156        1.56       32.43
         24 |          6        0.06       32.49
         99 |      6,751       67.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016